Chemical Coordination and Regulation Question 7
7. Hypersecretion of Growth Hormone in adults does not cause further increase in height, because:
[2017]
(a) Epiphyseal plates close after adolescence.
(b) Bones loose their sensitivity to Growth Hormone in adults.
(c) Muscle fibres do not grow in size after birth.
(d) Growth Hormone becomes inactive in adults.
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Answer : a
Hints & Solutions
(a) Epiphyseal plate which is responsible for bone growth close after adolescence so hypersecretion of growth hormone in adults does not cause further increase in height. The epiphyseal plate is a hyaline cartilage plate in the metaphysis at each end of a long bone.
